Several years ago, an African American 'community activist' in Dallas was convicted of vandalism. It was discovered that he had spray painted similar threats on the building of a black church the weekend before the state legislature was scheduled to vote on a hate crimes bill.
I think it was O supporters however in some people’s minds it might make them feel they wouldn’t want to spend 4 years of these kinds of incidents and therefore may change some who may have voted for O so they don’t have to have racial problems so if they vote McCain we won’t have to deal racial division.